美国NEWMARK RM-3系列旋转工作台由6061铝合金加工而成，提供了一个轻便、坚固和稳定的平台。RM-3有一个略高于2英寸厚的低轮廓。这个旋转阶段是接口与Nema 17电机，可以工厂安装或由客户安装。RM-3采用蜗轮传动，齿轮比为72:1。蜗轮是预加载的，以最大限度地减少齿隙在齿轮系
Specifications
| Resolution | Up to 0.29 arc-sec (depends on gear ratio and motor type) |
| Accuracy | 70 arc-sec |
| Max. Speed | Stepper Motor: 30°/sec (90:1 gear ratio), 50°/sec (45:1 gear ratio) Servo Motor: 100°/sec (90:1 gear ratio), 200°/sec (45:1 gear ratio) |
| Unidirectional Repeatability | 5 arc-sec |
| Bi-directional Repeatability | 45 arc-sec |
| Max Load Capacity | 20.4 kg (45 lbs) |
| Travel Range | 360° Continuous |
| Encoder | Optical rotary encoder mounted to rear of motor, 1000 lines (4000 CPR) with Index (Optional, Standard with servo motor) |
| Limit Switches | None |
| Origin | Optical Home Switch (optional) Optical index mark on encoder (with encoder option) |
| Gear Ratio | 90:1 or 45:1 |
| Stage Weight | 1.4 kg (3 lbs) |
| Material | Aluminum Alloy Construction |
| Finish | Black Anodize |
